| on the 2.5" test pipes are smaller. In other words to the only way to get a 2.5" cat back exhaust to work with 3" down pipes is to do this setup.
same as mine.
3" down pipes
3" to 2.5" test pipes 2.5 " exhaust. My whole exhaust is Specialty Z except for my cat back thats b&b
 2006 Chevy Cobalt SS super charged (Daily driver/Gas saver) 1994 Nissan 300zx Twin Turbo (Weekend car) www.SVZA.NET |